Heddle frame for looms



April 6, 1954 A. BLlcKENsToRr-ER HEDDLE FRAME FOR LOOMS Filed Dec. 13, 1949 oo'w ou Patented Apr. 6, 1.954

HEDDLE FRAME Foa LooMs Albert Blickenstorfer, Horgen, Switzerland, assignor to E. Froehlich A. G., Horgen, Switzerland, a corporation of Switzerland Application December 13, 1949, Serial No. 132,783

Claims priority, application Switzerland December 1,5, 1948A 1 Claim.

This invention relates to improvements in heddle frames.

With heddle frames for looms having the staves formed of sections of steel or light metal the disadvantage has become apparent that by the hitting together of the staves during the weaving process and the knocking and rubbing action resulting` therefrom, the staves formed of thin-walled sections for reasons of weight become worn at the heavily stressed points in a comparatively short time, thus often causing fractures of the staves and at least making a premature replacement of the staves necessary. The trial has been made to rectify this deciency by making the side supports of wood and by tting guides mounted in the centre of the upper and the lower stave. This form of execution, however, is not altogether satisfactory, in particular not if heddles for looms with a large weaving width, such as 170 cm. and more have to be used, or with such looms which are fitted with dobbies having a pitch of only mm. in which case the maximum thickness of the heddle frame may at the most be 9.8 mm.

These deficiencies are to be eliminated by the present invention. The heddle frame for looms according to the invention has a frame made of metal, means for the protection of the frame parts being provided which are subjected to knocking and rubbing actions.

In the accompanying drawing two embodiments of the object of the invention are shown by way of example, in which:

Fig. 1 is a front view of the heddle frame according to a first embodiment,

Fig. 2 shows a corresponding section through the upper stave, and

Fig. 3 is a section through the upper stave, according to a second embodiment.

With the numerals I and 2 the two staves and with the numerals 3 and 4 the two side supports of the heddle frame (Fig. 1) are designated. As can be seen from Fig, 2 the staves I and 2 are sections of hollow bodies or rails made preferably of light metal, said sections comprising in a known manner along their longitudinal edge a T-shaped bracket 1 for the reception of supporting hook means 8. One of the outer or side walls of the stave is provided with a recess in which a protection layer 5 is accommodated, made for example of plastics or plastic composition, such as plastic glass substance etc., said layer being somewhat thinner than the thickness of said recessed wall and extending the full length of said one side wall of the hollow stave for receiving and taking up the shocks occurring during the Weaving process thus preserving the metal section.

Instead of the protection layer being formed as shown in Fig. 2, it may also consist of spaced longitudinal strips 6 as shown in Fig. 3. To achieve a good adherence of the protection layer on the base, the base can be provided with anchorages. In many cases, however, it will be sufcient ii the base has been roughened before the application oi the protection layer 5 or 6 to achieve a fast adherence between the base and the protection layer.

A form of embodiment can also be visualized according to which the protection layer is arranged exchangeably on the side wall of the hollow section, so that it can be replaced when Worn.

When plastics or plastic glass substances are used, the protection layer can be applied by spraying.

The heddle frame described has the advantage that it is unaffected by shock and rubbing action and that, furthermore, it can be kept within the dimensions corresponding to the practical requirements.

It is self-evident that not only the two staves I and 2, but also the side supports 3 and l can be provided with a protection layer of the type described, so that these too can to a large extent be protected against wear and tear.

Normally it is sufficient if one of the lateral surfaces of the stave sections and in addition one of the lateral surfaces of the side supports are provided with a protective layer and this in such a manner that on arranging the heddle frames one behind the other a surface provided with the layer comes to lie adjacent a surface without a layer of the adjacent heddle frame.

It can thus be seen, that there has been provided according to the invention a heddle frame structure which comprises a hollow stave body made of metal, said stave body being provided with spaced side walls, a recess provided on one of said side walls, and protective layer means accommodated in said recess and slightly projecting therebeyond, said protective layer means being adapted to protect said stave against wear and tear to which said stave is subjected during operation of said loom by shock and rubbing actions, the wall thickness of said protective layer means being approximately smaller than the thickness of the wall provided with said recess, the total thickness of said layer means and of said one wall provided with said recess being 3 greater than the thickness of the other wall of said stave body.

What I claim and wish to secure by Letters Patent is:

In a heddle frame for looms; a hollow stave body made of metal, said stave body being provided with spaced side walls, one of said side walls being provided with a. recess positioned in the outer surface of said side wall, and protective layer means made of non-metallic material and accommodated in said recess and slightly projecting therebeyond, said protective layer means being adapted to protect said stave against wear and tear to which said stave is subjected during operation of said loom by shock and rubbing actions, the wall thickness of said protective layer means being relatively thinner than the thickness of the wall provided with said recess, the total thickness of said layer means and of said one wall provided with said recess being greater than the thickness of the other wall of said stave body said protective layer means being arranged in spaced relation to each 5 other in said wall recess.

References Cited in the le of this patent UNITED STATES PATENTS 10 Number Name Date 972,901 Nuttall Oct. 18, 1910 1,988,976 Andrews Jan. 22, 1935 2,300,197 Brown Oct. 27, 1942 2,385,718 Menking Sept. 25, 1945 15 2,461,497 Kaufmann Feb. 8, 1949 FOREIGN PATENTS Number Country Date 8,913 Great Britain of 1886 277,143 Germany Get. 24, 1913 

